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<head>
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  <title>Document</title>
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<body>
  <script>
    let arr = [1,2,3,4,5,6]
    function sum(a){
      let add = 0
      let paly = false
      let average = 0
      for(let i =0 ; i< a.length ; i++){
        if(a[i] % 2 !== 0) {
          average++
          add += a[i] 
          paly = true
      }
      if(paly === false) return 0
      }
      return (add / average)
    }
 console.log(sum(arr));



  </script>
  
</body>
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